If you were trying to visualize flagella without staining, which microscope would you use?
A) phase-contrast
B) dark-field
C) fluorescent
D) confocal
E) bright-field
A
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Which of the following organisms would likely have the most complex nervous system?
a. sea turtle b. sea anemone c. earthworm d. Portuguese man-of-war
Which of the following is an example of a fundamental niche?
A) a mouse feeding on only small seeds in the presence of a competitor B) an amphibian laying eggs in all possible habitats C) a bird nesting on top of a tree in the presence of predators D) a lizard feeding on insects only at dawn when snakes are present
The ________ enclose and protect the flower bud, while the ________ advertise the flower to insects and other pollinators
A) anthers... petals B) carpels... stigmata C) sepals... stamens D) sepals... petals
The flu virus mutates fairly frequently. Its adhesive proteins change such that we have different "strains" of influenza each year. When a particular flu virus mutates such that its adhesive proteins change, which function of antibodies is disrupted?
a. complement activation b. neutralization c. opsonization d. agglutination